380 



INDEX 



Stapes, 217 



Starch, animal, 189 ; plant, 10 



Starfish, description, 74-80 ; labora- 

 tory, 275-277 ; organ systems, 76- 

 80 ; structure, 74-76 



Statocyst, Clam, 148 ; Crayfish, 103, 

 111; Obelia, 70 



Statoliths, 111 



Sternal sinus, 106 



Sternum, 179; Bee, 127; Crayfish, 

 100 ; Frog, 182 ; Grasshopper, 116 



Stigma, Euglena, 30 ; Volvox, 36 



Sting, 127, 128 



Stomach, Bee, 128, 129 ; Clam, 142 ; 

 Crayfish, 104; Frog, 183, 185; 

 Grasshopper, 118 



Stomodeum, 228 



Stone canal, 77 



Structure, Amoeba, 19-22 ; Bacteria, 

 12 ; Bee, external, 123-128 ; Cells, 

 5-8; Clam, external, 139; Cray- 

 fish, 99-104; external, Earth- 

 worm, 82-84; Euglena, 29-30; 

 Frog, external, 165; Grantia, 52- 

 55; Grasshopper, 114; Hydra, 

 58-62; Insects, 113; Obelia, asex- 

 ual, 68, 69, sexual, 69-71; Para- 

 mecium, 39-42 ; Pleurococcus, 1 1 ; 

 Spirogyra, 11; Volvox, 34, 36; 

 Vorticella, 48-50 ; Yeast, 13 



Subesophageal ganglion, Bee, 133 ; 

 Crayfish, 111 



Submucosa, 186 



Subneural vessel, 88 



Subscapular veins, 194 



Sucker, ventral, 231 



Sucrase, 188 



Sugar, synthesis of, 10, 13 



Sulcus marginalis, 185 



Suprabranchial chamber, 145 



Swarming, Bee, 131 



Swimming movement, Gonionemus, 

 71 



Symbiosis, Hydra, 62, 63 ; vs. para- 

 sitism, 63 



Symmetry, bilateral, 74 ; radial, 58 



Synkaryon {see Fertilization) 



Systemic arches, 195 



Tactile organs, Bee, 133 ; Crayfish, 

 111 



Tadpole, metamorphosis, 229 ; struc- 

 ture, 230 



Tail, Frog, degeneration, 230 



Tail bud, 226 



Tail fold, 235 



Tarsus, 117, 126 



Taste, Bee, 134; Frog, 216 



Teeth, 178 ; dental formula, 178 ; 

 Frog, 185; Mammals, 178; milk, 

 178 ; vomerine, 185 



Teleostomi, 156 



Telson, 100 



Temperature, birds, 159 ; control, 

 200; mammals, 159 



Tendons, 170, 173 



Tentacles, Hydra, 58, 60, 62 ; Obelia, 

 asexual stage, 69 ; sexual stage, 69- 

 70 



Tergum, Bee, 127; Crayfish, 100; 

 Grasshopper, 116 



Testes, Clam, 146 ; Bee, 130 ; Cray- 

 fish, 108; Earthworm, 92; Frog, 

 184, 204; Grasshopper, 120, 121; 

 Hydra, 64 (see Gonads) 



Testudinata, 158 



Thallophyta, 11 



Thigh, 166 



Thoracic cavity, 182 



Thoracic ganglia, Bee, 133 ; Grass- 

 hopper, 123 



Thorax, Bee, 125-127 ; Crayfish, 100 ; 

 Grasshopper, 116; Insects, 113 



Thyroxine, 207 



Tibia, Bee, 126; Frog, 180; Grass- 

 hopper, 117 



Tibio-fibula, 180 



Tiedemann's bodies, 77 



Tissue, 4, 81, 84 



Tissues, Vertebrates, 167 



Toads, 157 



Tongue, Bee, 125 ; Frog, 185, 187 



Torpedo, 155 



Trachea, Bee, 129; Frog, 190; 

 Grasshopper, 119; Insects, 129 



Tracheal trunks, 129 



Transition cells, 135 



Transverse processes, 178 



Trichocysts, 40 



Triploblastic animal, 66, 81 



Trivium, 75 



Trochanter, 116, 126 



Trophoblast, 237 



Tropism, 32, 46 



